musb_core.c 66.0 KB
Newer Older
F
Felipe Balbi 已提交
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86
/*
 * MUSB OTG driver core code
 *
 * Copyright 2005 Mentor Graphics Corporation
 * Copyright (C) 2005-2006 by Texas Instruments
 * Copyright (C) 2006-2007 Nokia Corporation
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA
 *
 * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
 * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

/*
 * Inventra (Multipoint) Dual-Role Controller Driver for Linux.
 *
 * This consists of a Host Controller Driver (HCD) and a peripheral
 * controller driver implementing the "Gadget" API; OTG support is
 * in the works.  These are normal Linux-USB controller drivers which
 * use IRQs and have no dedicated thread.
 *
 * This version of the driver has only been used with products from
 * Texas Instruments.  Those products integrate the Inventra logic
 * with other DMA, IRQ, and bus modules, as well as other logic that
 * needs to be reflected in this driver.
 *
 *
 * NOTE:  the original Mentor code here was pretty much a collection
 * of mechanisms that don't seem to have been fully integrated/working
 * for *any* Linux kernel version.  This version aims at Linux 2.6.now,
 * Key open issues include:
 *
 *  - Lack of host-side transaction scheduling, for all transfer types.
 *    The hardware doesn't do it; instead, software must.
 *
 *    This is not an issue for OTG devices that don't support external
 *    hubs, but for more "normal" USB hosts it's a user issue that the
 *    "multipoint" support doesn't scale in the expected ways.  That
 *    includes DaVinci EVM in a common non-OTG mode.
 *
 *      * Control and bulk use dedicated endpoints, and there's as
 *        yet no mechanism to either (a) reclaim the hardware when
 *        peripherals are NAKing, which gets complicated with bulk
 *        endpoints, or (b) use more than a single bulk endpoint in
 *        each direction.
 *
 *        RESULT:  one device may be perceived as blocking another one.
 *
 *      * Interrupt and isochronous will dynamically allocate endpoint
 *        hardware, but (a) there's no record keeping for bandwidth;
 *        (b) in the common case that few endpoints are available, there
 *        is no mechanism to reuse endpoints to talk to multiple devices.
 *
 *        RESULT:  At one extreme, bandwidth can be overcommitted in
 *        some hardware configurations, no faults will be reported.
 *        At the other extreme, the bandwidth capabilities which do
 *        exist tend to be severely undercommitted.  You can't yet hook
 *        up both a keyboard and a mouse to an external USB hub.
 */

/*
 * This gets many kinds of configuration information:
 *	- Kconfig for everything user-configurable
 *	- platform_device for addressing, irq, and platform_data
 *	- platform_data is mostly for board-specific informarion
D
David Brownell 已提交
87
 *	  (plus recentrly, SOC or family details)
F
Felipe Balbi 已提交
88 89 90 91 92 93 94 95 96 97 98 99 100 101 102
 *
 * Most of the conditional compilation will (someday) vanish.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/list.h>
#include <linux/kobject.h>
#include <linux/platform_device.h>
#include <linux/io.h>

#ifdef	CONFIG_ARM
F
Felipe Balbi 已提交
103 104
#include <mach/hardware.h>
#include <mach/memory.h>
F
Felipe Balbi 已提交
105 106 107 108 109 110 111 112 113 114
#include <asm/mach-types.h>
#endif

#include "musb_core.h"


#ifdef CONFIG_ARCH_DAVINCI
#include "davinci.h"
#endif

D
David Brownell 已提交
115
#define TA_WAIT_BCON(m) max_t(int, (m)->a_wait_bcon, OTG_TIME_A_WAIT_BCON)
F
Felipe Balbi 已提交
116 117


118
unsigned musb_debug;
119
module_param_named(debug, musb_debug, uint, S_IRUGO | S_IWUSR);
120
MODULE_PARM_DESC(debug, "Debug message level. Default = 0");
F
Felipe Balbi 已提交
121 122 123 124

#define DRIVER_AUTHOR "Mentor Graphics, Texas Instruments, Nokia"
#define DRIVER_DESC "Inventra Dual-Role USB Controller Driver"

125
#define MUSB_VERSION "6.0"
F
Felipe Balbi 已提交
126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151

#define DRIVER_INFO DRIVER_DESC ", v" MUSB_VERSION

#define MUSB_DRIVER_NAME "musb_hdrc"
const char musb_driver_name[] = MUSB_DRIVER_NAME;

MODULE_DESCRIPTION(DRIVER_INFO);
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" MUSB_DRIVER_NAME);


/*-------------------------------------------------------------------------*/

static inline struct musb *dev_to_musb(struct device *dev)
{
#ifdef CONFIG_USB_MUSB_HDRC_HCD
	/* usbcore insists dev->driver_data is a "struct hcd *" */
	return hcd_to_musb(dev_get_drvdata(dev));
#else
	return dev_get_drvdata(dev);
#endif
}

/*-------------------------------------------------------------------------*/

152 153
#if !defined(CONFIG_USB_TUSB6010) && !defined(CONFIG_BLACKFIN)

F
Felipe Balbi 已提交
154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270
/*
 * Load an endpoint's FIFO
 */
void musb_write_fifo(struct musb_hw_ep *hw_ep, u16 len, const u8 *src)
{
	void __iomem *fifo = hw_ep->fifo;

	prefetch((u8 *)src);

	DBG(4, "%cX ep%d fifo %p count %d buf %p\n",
			'T', hw_ep->epnum, fifo, len, src);

	/* we can't assume unaligned reads work */
	if (likely((0x01 & (unsigned long) src) == 0)) {
		u16	index = 0;

		/* best case is 32bit-aligned source address */
		if ((0x02 & (unsigned long) src) == 0) {
			if (len >= 4) {
				writesl(fifo, src + index, len >> 2);
				index += len & ~0x03;
			}
			if (len & 0x02) {
				musb_writew(fifo, 0, *(u16 *)&src[index]);
				index += 2;
			}
		} else {
			if (len >= 2) {
				writesw(fifo, src + index, len >> 1);
				index += len & ~0x01;
			}
		}
		if (len & 0x01)
			musb_writeb(fifo, 0, src[index]);
	} else  {
		/* byte aligned */
		writesb(fifo, src, len);
	}
}

/*
 * Unload an endpoint's FIFO
 */
void musb_read_fifo(struct musb_hw_ep *hw_ep, u16 len, u8 *dst)
{
	void __iomem *fifo = hw_ep->fifo;

	DBG(4, "%cX ep%d fifo %p count %d buf %p\n",
			'R', hw_ep->epnum, fifo, len, dst);

	/* we can't assume unaligned writes work */
	if (likely((0x01 & (unsigned long) dst) == 0)) {
		u16	index = 0;

		/* best case is 32bit-aligned destination address */
		if ((0x02 & (unsigned long) dst) == 0) {
			if (len >= 4) {
				readsl(fifo, dst, len >> 2);
				index = len & ~0x03;
			}
			if (len & 0x02) {
				*(u16 *)&dst[index] = musb_readw(fifo, 0);
				index += 2;
			}
		} else {
			if (len >= 2) {
				readsw(fifo, dst, len >> 1);
				index = len & ~0x01;
			}
		}
		if (len & 0x01)
			dst[index] = musb_readb(fifo, 0);
	} else  {
		/* byte aligned */
		readsb(fifo, dst, len);
	}
}

#endif	/* normal PIO */


/*-------------------------------------------------------------------------*/

/* for high speed test mode; see USB 2.0 spec 7.1.20 */
static const u8 musb_test_packet[53] = {
	/* implicit SYNC then DATA0 to start */

	/* JKJKJKJK x9 */
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	/* JJKKJJKK x8 */
	0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa, 0xaa,
	/* JJJJKKKK x8 */
	0xee, 0xee, 0xee, 0xee, 0xee, 0xee, 0xee, 0xee,
	/* JJJJJJJKKKKKKK x8 */
	0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
	/* JJJJJJJK x8 */
	0x7f, 0xbf, 0xdf, 0xef, 0xf7, 0xfb, 0xfd,
	/* JKKKKKKK x10, JK */
	0xfc, 0x7e, 0xbf, 0xdf, 0xef, 0xf7, 0xfb, 0xfd, 0x7e

	/* implicit CRC16 then EOP to end */
};

void musb_load_testpacket(struct musb *musb)
{
	void __iomem	*regs = musb->endpoints[0].regs;

	musb_ep_select(musb->mregs, 0);
	musb_write_fifo(musb->control_ep,
			sizeof(musb_test_packet), musb_test_packet);
	musb_writew(regs, MUSB_CSR0, MUSB_CSR0_TXPKTRDY);
}

/*-------------------------------------------------------------------------*/

const char *otg_state_string(struct musb *musb)
{
271
	switch (musb->xceiv->state) {
F
Felipe Balbi 已提交
272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299
	case OTG_STATE_A_IDLE:		return "a_idle";
	case OTG_STATE_A_WAIT_VRISE:	return "a_wait_vrise";
	case OTG_STATE_A_WAIT_BCON:	return "a_wait_bcon";
	case OTG_STATE_A_HOST:		return "a_host";
	case OTG_STATE_A_SUSPEND:	return "a_suspend";
	case OTG_STATE_A_PERIPHERAL:	return "a_peripheral";
	case OTG_STATE_A_WAIT_VFALL:	return "a_wait_vfall";
	case OTG_STATE_A_VBUS_ERR:	return "a_vbus_err";
	case OTG_STATE_B_IDLE:		return "b_idle";
	case OTG_STATE_B_SRP_INIT:	return "b_srp_init";
	case OTG_STATE_B_PERIPHERAL:	return "b_peripheral";
	case OTG_STATE_B_WAIT_ACON:	return "b_wait_acon";
	case OTG_STATE_B_HOST:		return "b_host";
	default:			return "UNDEFINED";
	}
}

#ifdef	CONFIG_USB_MUSB_OTG

/*
 * Handles OTG hnp timeouts, such as b_ase0_brst
 */
void musb_otg_timer_func(unsigned long data)
{
	struct musb	*musb = (struct musb *)data;
	unsigned long	flags;

	spin_lock_irqsave(&musb->lock, flags);
300
	switch (musb->xceiv->state) {
F
Felipe Balbi 已提交
301 302 303
	case OTG_STATE_B_WAIT_ACON:
		DBG(1, "HNP: b_wait_acon timeout; back to b_peripheral\n");
		musb_g_disconnect(musb);
304
		musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
F
Felipe Balbi 已提交
305 306
		musb->is_active = 0;
		break;
307
	case OTG_STATE_A_SUSPEND:
F
Felipe Balbi 已提交
308
	case OTG_STATE_A_WAIT_BCON:
309 310 311
		DBG(1, "HNP: %s timeout\n", otg_state_string(musb));
		musb_set_vbus(musb, 0);
		musb->xceiv->state = OTG_STATE_A_WAIT_VFALL;
F
Felipe Balbi 已提交
312 313 314 315 316 317 318 319 320
		break;
	default:
		DBG(1, "HNP: Unhandled mode %s\n", otg_state_string(musb));
	}
	musb->ignore_disconnect = 0;
	spin_unlock_irqrestore(&musb->lock, flags);
}

/*
D
David Brownell 已提交
321
 * Stops the HNP transition. Caller must take care of locking.
F
Felipe Balbi 已提交
322 323 324 325 326 327 328
 */
void musb_hnp_stop(struct musb *musb)
{
	struct usb_hcd	*hcd = musb_to_hcd(musb);
	void __iomem	*mbase = musb->mregs;
	u8	reg;

329 330
	DBG(1, "HNP: stop from %s\n", otg_state_string(musb));

331
	switch (musb->xceiv->state) {
F
Felipe Balbi 已提交
332 333
	case OTG_STATE_A_PERIPHERAL:
		musb_g_disconnect(musb);
334
		DBG(1, "HNP: back to %s\n", otg_state_string(musb));
F
Felipe Balbi 已提交
335 336 337 338
		break;
	case OTG_STATE_B_HOST:
		DBG(1, "HNP: Disabling HR\n");
		hcd->self.is_b_host = 0;
339
		musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
F
Felipe Balbi 已提交
340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396
		MUSB_DEV_MODE(musb);
		reg = musb_readb(mbase, MUSB_POWER);
		reg |= MUSB_POWER_SUSPENDM;
		musb_writeb(mbase, MUSB_POWER, reg);
		/* REVISIT: Start SESSION_REQUEST here? */
		break;
	default:
		DBG(1, "HNP: Stopping in unknown state %s\n",
			otg_state_string(musb));
	}

	/*
	 * When returning to A state after HNP, avoid hub_port_rebounce(),
	 * which cause occasional OPT A "Did not receive reset after connect"
	 * errors.
	 */
	musb->port1_status &=
		~(1 << USB_PORT_FEAT_C_CONNECTION);
}

#endif

/*
 * Interrupt Service Routine to record USB "global" interrupts.
 * Since these do not happen often and signify things of
 * paramount importance, it seems OK to check them individually;
 * the order of the tests is specified in the manual
 *
 * @param musb instance pointer
 * @param int_usb register contents
 * @param devctl
 * @param power
 */

#define STAGE0_MASK (MUSB_INTR_RESUME | MUSB_INTR_SESSREQ \
		| MUSB_INTR_VBUSERROR | MUSB_INTR_CONNECT \
		| MUSB_INTR_RESET)

static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
				u8 devctl, u8 power)
{
	irqreturn_t handled = IRQ_NONE;
	void __iomem *mbase = musb->mregs;

	DBG(3, "<== Power=%02x, DevCtl=%02x, int_usb=0x%x\n", power, devctl,
		int_usb);

	/* in host mode, the peripheral may issue remote wakeup.
	 * in peripheral mode, the host may resume the link.
	 * spurious RESUME irqs happen too, paired with SUSPEND.
	 */
	if (int_usb & MUSB_INTR_RESUME) {
		handled = IRQ_HANDLED;
		DBG(3, "RESUME (%s)\n", otg_state_string(musb));

		if (devctl & MUSB_DEVCTL_HM) {
#ifdef CONFIG_USB_MUSB_HDRC_HCD
397
			switch (musb->xceiv->state) {
F
Felipe Balbi 已提交
398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419
			case OTG_STATE_A_SUSPEND:
				/* remote wakeup?  later, GetPortStatus
				 * will stop RESUME signaling
				 */

				if (power & MUSB_POWER_SUSPENDM) {
					/* spurious */
					musb->int_usb &= ~MUSB_INTR_SUSPEND;
					DBG(2, "Spurious SUSPENDM\n");
					break;
				}

				power &= ~MUSB_POWER_SUSPENDM;
				musb_writeb(mbase, MUSB_POWER,
						power | MUSB_POWER_RESUME);

				musb->port1_status |=
						(USB_PORT_STAT_C_SUSPEND << 16)
						| MUSB_PORT_STAT_RESUME;
				musb->rh_timer = jiffies
						+ msecs_to_jiffies(20);

420
				musb->xceiv->state = OTG_STATE_A_HOST;
F
Felipe Balbi 已提交
421 422 423 424
				musb->is_active = 1;
				usb_hcd_resume_root_hub(musb_to_hcd(musb));
				break;
			case OTG_STATE_B_WAIT_ACON:
425
				musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
F
Felipe Balbi 已提交
426 427 428 429 430 431 432 433 434 435
				musb->is_active = 1;
				MUSB_DEV_MODE(musb);
				break;
			default:
				WARNING("bogus %s RESUME (%s)\n",
					"host",
					otg_state_string(musb));
			}
#endif
		} else {
436
			switch (musb->xceiv->state) {
F
Felipe Balbi 已提交
437 438 439
#ifdef CONFIG_USB_MUSB_HDRC_HCD
			case OTG_STATE_A_SUSPEND:
				/* possibly DISCONNECT is upcoming */
440
				musb->xceiv->state = OTG_STATE_A_HOST;
F
Felipe Balbi 已提交
441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484
				usb_hcd_resume_root_hub(musb_to_hcd(musb));
				break;
#endif
#ifdef CONFIG_USB_GADGET_MUSB_HDRC
			case OTG_STATE_B_WAIT_ACON:
			case OTG_STATE_B_PERIPHERAL:
				/* disconnect while suspended?  we may
				 * not get a disconnect irq...
				 */
				if ((devctl & MUSB_DEVCTL_VBUS)
						!= (3 << MUSB_DEVCTL_VBUS_SHIFT)
						) {
					musb->int_usb |= MUSB_INTR_DISCONNECT;
					musb->int_usb &= ~MUSB_INTR_SUSPEND;
					break;
				}
				musb_g_resume(musb);
				break;
			case OTG_STATE_B_IDLE:
				musb->int_usb &= ~MUSB_INTR_SUSPEND;
				break;
#endif
			default:
				WARNING("bogus %s RESUME (%s)\n",
					"peripheral",
					otg_state_string(musb));
			}
		}
	}

#ifdef CONFIG_USB_MUSB_HDRC_HCD
	/* see manual for the order of the tests */
	if (int_usb & MUSB_INTR_SESSREQ) {
		DBG(1, "SESSION_REQUEST (%s)\n", otg_state_string(musb));

		/* IRQ arrives from ID pin sense or (later, if VBUS power
		 * is removed) SRP.  responses are time critical:
		 *  - turn on VBUS (with silicon-specific mechanism)
		 *  - go through A_WAIT_VRISE
		 *  - ... to A_WAIT_BCON.
		 * a_wait_vrise_tmout triggers VBUS_ERROR transitions
		 */
		musb_writeb(mbase, MUSB_DEVCTL, MUSB_DEVCTL_SESSION);
		musb->ep0_stage = MUSB_EP0_START;
485
		musb->xceiv->state = OTG_STATE_A_IDLE;
F
Felipe Balbi 已提交
486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510
		MUSB_HST_MODE(musb);
		musb_set_vbus(musb, 1);

		handled = IRQ_HANDLED;
	}

	if (int_usb & MUSB_INTR_VBUSERROR) {
		int	ignore = 0;

		/* During connection as an A-Device, we may see a short
		 * current spikes causing voltage drop, because of cable
		 * and peripheral capacitance combined with vbus draw.
		 * (So: less common with truly self-powered devices, where
		 * vbus doesn't act like a power supply.)
		 *
		 * Such spikes are short; usually less than ~500 usec, max
		 * of ~2 msec.  That is, they're not sustained overcurrent
		 * errors, though they're reported using VBUSERROR irqs.
		 *
		 * Workarounds:  (a) hardware: use self powered devices.
		 * (b) software:  ignore non-repeated VBUS errors.
		 *
		 * REVISIT:  do delays from lots of DEBUG_KERNEL checks
		 * make trouble here, keeping VBUS < 4.4V ?
		 */
511
		switch (musb->xceiv->state) {
F
Felipe Balbi 已提交
512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559
		case OTG_STATE_A_HOST:
			/* recovery is dicey once we've gotten past the
			 * initial stages of enumeration, but if VBUS
			 * stayed ok at the other end of the link, and
			 * another reset is due (at least for high speed,
			 * to redo the chirp etc), it might work OK...
			 */
		case OTG_STATE_A_WAIT_BCON:
		case OTG_STATE_A_WAIT_VRISE:
			if (musb->vbuserr_retry) {
				musb->vbuserr_retry--;
				ignore = 1;
				devctl |= MUSB_DEVCTL_SESSION;
				musb_writeb(mbase, MUSB_DEVCTL, devctl);
			} else {
				musb->port1_status |=
					  (1 << USB_PORT_FEAT_OVER_CURRENT)
					| (1 << USB_PORT_FEAT_C_OVER_CURRENT);
			}
			break;
		default:
			break;
		}

		DBG(1, "VBUS_ERROR in %s (%02x, %s), retry #%d, port1 %08x\n",
				otg_state_string(musb),
				devctl,
				({ char *s;
				switch (devctl & MUSB_DEVCTL_VBUS) {
				case 0 << MUSB_DEVCTL_VBUS_SHIFT:
					s = "<SessEnd"; break;
				case 1 << MUSB_DEVCTL_VBUS_SHIFT:
					s = "<AValid"; break;
				case 2 << MUSB_DEVCTL_VBUS_SHIFT:
					s = "<VBusValid"; break;
				/* case 3 << MUSB_DEVCTL_VBUS_SHIFT: */
				default:
					s = "VALID"; break;
				}; s; }),
				VBUSERR_RETRY_COUNT - musb->vbuserr_retry,
				musb->port1_status);

		/* go through A_WAIT_VFALL then start a new session */
		if (!ignore)
			musb_set_vbus(musb, 0);
		handled = IRQ_HANDLED;
	}

560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622

	if (int_usb & MUSB_INTR_SUSPEND) {
		DBG(1, "SUSPEND (%s) devctl %02x power %02x\n",
				otg_state_string(musb), devctl, power);
		handled = IRQ_HANDLED;

		switch (musb->xceiv->state) {
#ifdef	CONFIG_USB_MUSB_OTG
		case OTG_STATE_A_PERIPHERAL:
			/* We also come here if the cable is removed, since
			 * this silicon doesn't report ID-no-longer-grounded.
			 *
			 * We depend on T(a_wait_bcon) to shut us down, and
			 * hope users don't do anything dicey during this
			 * undesired detour through A_WAIT_BCON.
			 */
			musb_hnp_stop(musb);
			usb_hcd_resume_root_hub(musb_to_hcd(musb));
			musb_root_disconnect(musb);
			musb_platform_try_idle(musb, jiffies
					+ msecs_to_jiffies(musb->a_wait_bcon
						? : OTG_TIME_A_WAIT_BCON));

			break;
#endif
		case OTG_STATE_B_IDLE:
			if (!musb->is_active)
				break;
		case OTG_STATE_B_PERIPHERAL:
			musb_g_suspend(musb);
			musb->is_active = is_otg_enabled(musb)
					&& musb->xceiv->gadget->b_hnp_enable;
			if (musb->is_active) {
#ifdef	CONFIG_USB_MUSB_OTG
				musb->xceiv->state = OTG_STATE_B_WAIT_ACON;
				DBG(1, "HNP: Setting timer for b_ase0_brst\n");
				mod_timer(&musb->otg_timer, jiffies
					+ msecs_to_jiffies(
							OTG_TIME_B_ASE0_BRST));
#endif
			}
			break;
		case OTG_STATE_A_WAIT_BCON:
			if (musb->a_wait_bcon != 0)
				musb_platform_try_idle(musb, jiffies
					+ msecs_to_jiffies(musb->a_wait_bcon));
			break;
		case OTG_STATE_A_HOST:
			musb->xceiv->state = OTG_STATE_A_SUSPEND;
			musb->is_active = is_otg_enabled(musb)
					&& musb->xceiv->host->b_hnp_enable;
			break;
		case OTG_STATE_B_HOST:
			/* Transition to B_PERIPHERAL, see 6.8.2.6 p 44 */
			DBG(1, "REVISIT: SUSPEND as B_HOST\n");
			break;
		default:
			/* "should not happen" */
			musb->is_active = 0;
			break;
		}
	}

F
Felipe Balbi 已提交
623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652
	if (int_usb & MUSB_INTR_CONNECT) {
		struct usb_hcd *hcd = musb_to_hcd(musb);

		handled = IRQ_HANDLED;
		musb->is_active = 1;
		set_bit(HCD_FLAG_SAW_IRQ, &hcd->flags);

		musb->ep0_stage = MUSB_EP0_START;

#ifdef CONFIG_USB_MUSB_OTG
		/* flush endpoints when transitioning from Device Mode */
		if (is_peripheral_active(musb)) {
			/* REVISIT HNP; just force disconnect */
		}
		musb_writew(mbase, MUSB_INTRTXE, musb->epmask);
		musb_writew(mbase, MUSB_INTRRXE, musb->epmask & 0xfffe);
		musb_writeb(mbase, MUSB_INTRUSBE, 0xf7);
#endif
		musb->port1_status &= ~(USB_PORT_STAT_LOW_SPEED
					|USB_PORT_STAT_HIGH_SPEED
					|USB_PORT_STAT_ENABLE
					);
		musb->port1_status |= USB_PORT_STAT_CONNECTION
					|(USB_PORT_STAT_C_CONNECTION << 16);

		/* high vs full speed is just a guess until after reset */
		if (devctl & MUSB_DEVCTL_LSDEV)
			musb->port1_status |= USB_PORT_STAT_LOW_SPEED;

		/* indicate new connection to OTG machine */
653
		switch (musb->xceiv->state) {
F
Felipe Balbi 已提交
654 655 656 657
		case OTG_STATE_B_PERIPHERAL:
			if (int_usb & MUSB_INTR_SUSPEND) {
				DBG(1, "HNP: SUSPEND+CONNECT, now b_host\n");
				int_usb &= ~MUSB_INTR_SUSPEND;
658
				goto b_host;
F
Felipe Balbi 已提交
659 660 661 662
			} else
				DBG(1, "CONNECT as b_peripheral???\n");
			break;
		case OTG_STATE_B_WAIT_ACON:
663 664
			DBG(1, "HNP: CONNECT, now b_host\n");
b_host:
665
			musb->xceiv->state = OTG_STATE_B_HOST;
F
Felipe Balbi 已提交
666
			hcd->self.is_b_host = 1;
667 668
			musb->ignore_disconnect = 0;
			del_timer(&musb->otg_timer);
F
Felipe Balbi 已提交
669 670 671 672
			break;
		default:
			if ((devctl & MUSB_DEVCTL_VBUS)
					== (3 << MUSB_DEVCTL_VBUS_SHIFT)) {
673
				musb->xceiv->state = OTG_STATE_A_HOST;
F
Felipe Balbi 已提交
674 675 676 677
				hcd->self.is_b_host = 0;
			}
			break;
		}
678 679 680 681 682 683 684 685

		/* poke the root hub */
		MUSB_HST_MODE(musb);
		if (hcd->status_urb)
			usb_hcd_poll_rh_status(hcd);
		else
			usb_hcd_resume_root_hub(hcd);

F
Felipe Balbi 已提交
686 687 688 689 690
		DBG(1, "CONNECT (%s) devctl %02x\n",
				otg_state_string(musb), devctl);
	}
#endif	/* CONFIG_USB_MUSB_HDRC_HCD */

691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740
	if ((int_usb & MUSB_INTR_DISCONNECT) && !musb->ignore_disconnect) {
		DBG(1, "DISCONNECT (%s) as %s, devctl %02x\n",
				otg_state_string(musb),
				MUSB_MODE(musb), devctl);
		handled = IRQ_HANDLED;

		switch (musb->xceiv->state) {
#ifdef CONFIG_USB_MUSB_HDRC_HCD
		case OTG_STATE_A_HOST:
		case OTG_STATE_A_SUSPEND:
			usb_hcd_resume_root_hub(musb_to_hcd(musb));
			musb_root_disconnect(musb);
			if (musb->a_wait_bcon != 0 && is_otg_enabled(musb))
				musb_platform_try_idle(musb, jiffies
					+ msecs_to_jiffies(musb->a_wait_bcon));
			break;
#endif	/* HOST */
#ifdef CONFIG_USB_MUSB_OTG
		case OTG_STATE_B_HOST:
			/* REVISIT this behaves for "real disconnect"
			 * cases; make sure the other transitions from
			 * from B_HOST act right too.  The B_HOST code
			 * in hnp_stop() is currently not used...
			 */
			musb_root_disconnect(musb);
			musb_to_hcd(musb)->self.is_b_host = 0;
			musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
			MUSB_DEV_MODE(musb);
			musb_g_disconnect(musb);
			break;
		case OTG_STATE_A_PERIPHERAL:
			musb_hnp_stop(musb);
			musb_root_disconnect(musb);
			/* FALLTHROUGH */
		case OTG_STATE_B_WAIT_ACON:
			/* FALLTHROUGH */
#endif	/* OTG */
#ifdef CONFIG_USB_GADGET_MUSB_HDRC
		case OTG_STATE_B_PERIPHERAL:
		case OTG_STATE_B_IDLE:
			musb_g_disconnect(musb);
			break;
#endif	/* GADGET */
		default:
			WARNING("unhandled DISCONNECT transition (%s)\n",
				otg_state_string(musb));
			break;
		}
	}

F
Felipe Balbi 已提交
741 742 743 744
	/* mentor saves a bit: bus reset and babble share the same irq.
	 * only host sees babble; only peripheral sees bus reset.
	 */
	if (int_usb & MUSB_INTR_RESET) {
745
		handled = IRQ_HANDLED;
F
Felipe Balbi 已提交
746 747 748 749 750 751 752 753 754 755 756 757
		if (is_host_capable() && (devctl & MUSB_DEVCTL_HM) != 0) {
			/*
			 * Looks like non-HS BABBLE can be ignored, but
			 * HS BABBLE is an error condition. For HS the solution
			 * is to avoid babble in the first place and fix what
			 * caused BABBLE. When HS BABBLE happens we can only
			 * stop the session.
			 */
			if (devctl & (MUSB_DEVCTL_FSDEV | MUSB_DEVCTL_LSDEV))
				DBG(1, "BABBLE devctl: %02x\n", devctl);
			else {
				ERR("Stopping host session -- babble\n");
758
				musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
F
Felipe Balbi 已提交
759 760 761
			}
		} else if (is_peripheral_capable()) {
			DBG(1, "BUS RESET as %s\n", otg_state_string(musb));
762
			switch (musb->xceiv->state) {
F
Felipe Balbi 已提交
763 764 765 766 767 768 769 770 771 772
#ifdef CONFIG_USB_OTG
			case OTG_STATE_A_SUSPEND:
				/* We need to ignore disconnect on suspend
				 * otherwise tusb 2.0 won't reconnect after a
				 * power cycle, which breaks otg compliance.
				 */
				musb->ignore_disconnect = 1;
				musb_g_reset(musb);
				/* FALLTHROUGH */
			case OTG_STATE_A_WAIT_BCON:	/* OPT TD.4.7-900ms */
D
David Brownell 已提交
773 774 775 776 777 778
				/* never use invalid T(a_wait_bcon) */
				DBG(1, "HNP: in %s, %d msec timeout\n",
						otg_state_string(musb),
						TA_WAIT_BCON(musb));
				mod_timer(&musb->otg_timer, jiffies
					+ msecs_to_jiffies(TA_WAIT_BCON(musb)));
F
Felipe Balbi 已提交
779 780
				break;
			case OTG_STATE_A_PERIPHERAL:
781 782 783
				musb->ignore_disconnect = 0;
				del_timer(&musb->otg_timer);
				musb_g_reset(musb);
F
Felipe Balbi 已提交
784 785 786 787
				break;
			case OTG_STATE_B_WAIT_ACON:
				DBG(1, "HNP: RESET (%s), to b_peripheral\n",
					otg_state_string(musb));
788
				musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
F
Felipe Balbi 已提交
789 790 791 792
				musb_g_reset(musb);
				break;
#endif
			case OTG_STATE_B_IDLE:
793
				musb->xceiv->state = OTG_STATE_B_PERIPHERAL;
F
Felipe Balbi 已提交
794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849
				/* FALLTHROUGH */
			case OTG_STATE_B_PERIPHERAL:
				musb_g_reset(musb);
				break;
			default:
				DBG(1, "Unhandled BUS RESET as %s\n",
					otg_state_string(musb));
			}
		}
	}

#if 0
/* REVISIT ... this would be for multiplexing periodic endpoints, or
 * supporting transfer phasing to prevent exceeding ISO bandwidth
 * limits of a given frame or microframe.
 *
 * It's not needed for peripheral side, which dedicates endpoints;
 * though it _might_ use SOF irqs for other purposes.
 *
 * And it's not currently needed for host side, which also dedicates
 * endpoints, relies on TX/RX interval registers, and isn't claimed
 * to support ISO transfers yet.
 */
	if (int_usb & MUSB_INTR_SOF) {
		void __iomem *mbase = musb->mregs;
		struct musb_hw_ep	*ep;
		u8 epnum;
		u16 frame;

		DBG(6, "START_OF_FRAME\n");
		handled = IRQ_HANDLED;

		/* start any periodic Tx transfers waiting for current frame */
		frame = musb_readw(mbase, MUSB_FRAME);
		ep = musb->endpoints;
		for (epnum = 1; (epnum < musb->nr_endpoints)
					&& (musb->epmask >= (1 << epnum));
				epnum++, ep++) {
			/*
			 * FIXME handle framecounter wraps (12 bits)
			 * eliminate duplicated StartUrb logic
			 */
			if (ep->dwWaitFrame >= frame) {
				ep->dwWaitFrame = 0;
				pr_debug("SOF --> periodic TX%s on %d\n",
					ep->tx_channel ? " DMA" : "",
					epnum);
				if (!ep->tx_channel)
					musb_h_tx_start(musb, epnum);
				else
					cppi_hostdma_start(musb, epnum);
			}
		}		/* end of for loop */
	}
#endif

850
	schedule_work(&musb->irq_work);
F
Felipe Balbi 已提交
851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976

	return handled;
}

/*-------------------------------------------------------------------------*/

/*
* Program the HDRC to start (enable interrupts, dma, etc.).
*/
void musb_start(struct musb *musb)
{
	void __iomem	*regs = musb->mregs;
	u8		devctl = musb_readb(regs, MUSB_DEVCTL);

	DBG(2, "<== devctl %02x\n", devctl);

	/*  Set INT enable registers, enable interrupts */
	musb_writew(regs, MUSB_INTRTXE, musb->epmask);
	musb_writew(regs, MUSB_INTRRXE, musb->epmask & 0xfffe);
	musb_writeb(regs, MUSB_INTRUSBE, 0xf7);

	musb_writeb(regs, MUSB_TESTMODE, 0);

	/* put into basic highspeed mode and start session */
	musb_writeb(regs, MUSB_POWER, MUSB_POWER_ISOUPDATE
						| MUSB_POWER_SOFTCONN
						| MUSB_POWER_HSENAB
						/* ENSUSPEND wedges tusb */
						/* | MUSB_POWER_ENSUSPEND */
						);

	musb->is_active = 0;
	devctl = musb_readb(regs, MUSB_DEVCTL);
	devctl &= ~MUSB_DEVCTL_SESSION;

	if (is_otg_enabled(musb)) {
		/* session started after:
		 * (a) ID-grounded irq, host mode;
		 * (b) vbus present/connect IRQ, peripheral mode;
		 * (c) peripheral initiates, using SRP
		 */
		if ((devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS)
			musb->is_active = 1;
		else
			devctl |= MUSB_DEVCTL_SESSION;

	} else if (is_host_enabled(musb)) {
		/* assume ID pin is hard-wired to ground */
		devctl |= MUSB_DEVCTL_SESSION;

	} else /* peripheral is enabled */ {
		if ((devctl & MUSB_DEVCTL_VBUS) == MUSB_DEVCTL_VBUS)
			musb->is_active = 1;
	}
	musb_platform_enable(musb);
	musb_writeb(regs, MUSB_DEVCTL, devctl);
}


static void musb_generic_disable(struct musb *musb)
{
	void __iomem	*mbase = musb->mregs;
	u16	temp;

	/* disable interrupts */
	musb_writeb(mbase, MUSB_INTRUSBE, 0);
	musb_writew(mbase, MUSB_INTRTXE, 0);
	musb_writew(mbase, MUSB_INTRRXE, 0);

	/* off */
	musb_writeb(mbase, MUSB_DEVCTL, 0);

	/*  flush pending interrupts */
	temp = musb_readb(mbase, MUSB_INTRUSB);
	temp = musb_readw(mbase, MUSB_INTRTX);
	temp = musb_readw(mbase, MUSB_INTRRX);

}

/*
 * Make the HDRC stop (disable interrupts, etc.);
 * reversible by musb_start
 * called on gadget driver unregister
 * with controller locked, irqs blocked
 * acts as a NOP unless some role activated the hardware
 */
void musb_stop(struct musb *musb)
{
	/* stop IRQs, timers, ... */
	musb_platform_disable(musb);
	musb_generic_disable(musb);
	DBG(3, "HDRC disabled\n");

	/* FIXME
	 *  - mark host and/or peripheral drivers unusable/inactive
	 *  - disable DMA (and enable it in HdrcStart)
	 *  - make sure we can musb_start() after musb_stop(); with
	 *    OTG mode, gadget driver module rmmod/modprobe cycles that
	 *  - ...
	 */
	musb_platform_try_idle(musb, 0);
}

static void musb_shutdown(struct platform_device *pdev)
{
	struct musb	*musb = dev_to_musb(&pdev->dev);
	unsigned long	flags;

	spin_lock_irqsave(&musb->lock, flags);
	musb_platform_disable(musb);
	musb_generic_disable(musb);
	if (musb->clock) {
		clk_put(musb->clock);
		musb->clock = NULL;
	}
	spin_unlock_irqrestore(&musb->lock, flags);

	/* FIXME power down */
}


/*-------------------------------------------------------------------------*/

/*
 * The silicon either has hard-wired endpoint configurations, or else
 * "dynamic fifo" sizing.  The driver has support for both, though at this
D
David Brownell 已提交
977 978 979
 * writing only the dynamic sizing is very well tested.   Since we switched
 * away from compile-time hardware parameters, we can no longer rely on
 * dead code elimination to leave only the relevant one in the object file.
F
Felipe Balbi 已提交
980 981 982 983 984
 *
 * We don't currently use dynamic fifo setup capability to do anything
 * more than selecting one of a bunch of predefined configurations.
 */
#if defined(CONFIG_USB_TUSB6010) || \
985
	defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP3)
F
Felipe Balbi 已提交
986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068
static ushort __initdata fifo_mode = 4;
#else
static ushort __initdata fifo_mode = 2;
#endif

/* "modprobe ... fifo_mode=1" etc */
module_param(fifo_mode, ushort, 0);
MODULE_PARM_DESC(fifo_mode, "initial endpoint configuration");


enum fifo_style { FIFO_RXTX, FIFO_TX, FIFO_RX } __attribute__ ((packed));
enum buf_mode { BUF_SINGLE, BUF_DOUBLE } __attribute__ ((packed));

struct fifo_cfg {
	u8		hw_ep_num;
	enum fifo_style	style;
	enum buf_mode	mode;
	u16		maxpacket;
};

/*
 * tables defining fifo_mode values.  define more if you like.
 * for host side, make sure both halves of ep1 are set up.
 */

/* mode 0 - fits in 2KB */
static struct fifo_cfg __initdata mode_0_cfg[] = {
{ .hw_ep_num = 1, .style = FIFO_TX,   .maxpacket = 512, },
{ .hw_ep_num = 1, .style = FIFO_RX,   .maxpacket = 512, },
{ .hw_ep_num = 2, .style = FIFO_RXTX, .maxpacket = 512, },
{ .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, },
{ .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, },
};

/* mode 1 - fits in 4KB */
static struct fifo_cfg __initdata mode_1_cfg[] = {
{ .hw_ep_num = 1, .style = FIFO_TX,   .maxpacket = 512, .mode = BUF_DOUBLE, },
{ .hw_ep_num = 1, .style = FIFO_RX,   .maxpacket = 512, .mode = BUF_DOUBLE, },
{ .hw_ep_num = 2, .style = FIFO_RXTX, .maxpacket = 512, .mode = BUF_DOUBLE, },
{ .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, },
{ .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, },
};

/* mode 2 - fits in 4KB */
static struct fifo_cfg __initdata mode_2_cfg[] = {
{ .hw_ep_num = 1, .style = FIFO_TX,   .maxpacket = 512, },
{ .hw_ep_num = 1, .style = FIFO_RX,   .maxpacket = 512, },
{ .hw_ep_num = 2, .style = FIFO_TX,   .maxpacket = 512, },
{ .hw_ep_num = 2, .style = FIFO_RX,   .maxpacket = 512, },
{ .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, },
{ .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, },
};

/* mode 3 - fits in 4KB */
static struct fifo_cfg __initdata mode_3_cfg[] = {
{ .hw_ep_num = 1, .style = FIFO_TX,   .maxpacket = 512, .mode = BUF_DOUBLE, },
{ .hw_ep_num = 1, .style = FIFO_RX,   .maxpacket = 512, .mode = BUF_DOUBLE, },
{ .hw_ep_num = 2, .style = FIFO_TX,   .maxpacket = 512, },
{ .hw_ep_num = 2, .style = FIFO_RX,   .maxpacket = 512, },
{ .hw_ep_num = 3, .style = FIFO_RXTX, .maxpacket = 256, },
{ .hw_ep_num = 4, .style = FIFO_RXTX, .maxpacket = 256, },
};

/* mode 4 - fits in 16KB */
static struct fifo_cfg __initdata mode_4_cfg[] = {
{ .hw_ep_num =  1, .style = FIFO_TX,   .maxpacket = 512, },
{ .hw_ep_num =  1, .style = FIFO_RX,   .maxpacket = 512, },
{ .hw_ep_num =  2, .style = FIFO_TX,   .maxpacket = 512, },
{ .hw_ep_num =  2, .style = FIFO_RX,   .maxpacket = 512, },
{ .hw_ep_num =  3, .style = FIFO_TX,   .maxpacket = 512, },
{ .hw_ep_num =  3, .style = FIFO_RX,   .maxpacket = 512, },
{ .hw_ep_num =  4, .style = FIFO_TX,   .maxpacket = 512, },
{ .hw_ep_num =  4, .style = FIFO_RX,   .maxpacket = 512, },
{ .hw_ep_num =  5, .style = FIFO_TX,   .maxpacket = 512, },
{ .hw_ep_num =  5, .style = FIFO_RX,   .maxpacket = 512, },
{ .hw_ep_num =  6, .style = FIFO_TX,   .maxpacket = 512, },
{ .hw_ep_num =  6, .style = FIFO_RX,   .maxpacket = 512, },
{ .hw_ep_num =  7, .style = FIFO_TX,   .maxpacket = 512, },
{ .hw_ep_num =  7, .style = FIFO_RX,   .maxpacket = 512, },
{ .hw_ep_num =  8, .style = FIFO_TX,   .maxpacket = 512, },
{ .hw_ep_num =  8, .style = FIFO_RX,   .maxpacket = 512, },
{ .hw_ep_num =  9, .style = FIFO_TX,   .maxpacket = 512, },
{ .hw_ep_num =  9, .style = FIFO_RX,   .maxpacket = 512, },
1069 1070 1071 1072 1073 1074 1075
{ .hw_ep_num = 10, .style = FIFO_TX,   .maxpacket = 256, },
{ .hw_ep_num = 10, .style = FIFO_RX,   .maxpacket = 64, },
{ .hw_ep_num = 11, .style = FIFO_TX,   .maxpacket = 256, },
{ .hw_ep_num = 11, .style = FIFO_RX,   .maxpacket = 64, },
{ .hw_ep_num = 12, .style = FIFO_TX,   .maxpacket = 256, },
{ .hw_ep_num = 12, .style = FIFO_RX,   .maxpacket = 64, },
{ .hw_ep_num = 13, .style = FIFO_RXTX, .maxpacket = 4096, },
F
Felipe Balbi 已提交
1076 1077 1078 1079
{ .hw_ep_num = 14, .style = FIFO_RXTX, .maxpacket = 1024, },
{ .hw_ep_num = 15, .style = FIFO_RXTX, .maxpacket = 1024, },
};

1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109
/* mode 5 - fits in 8KB */
static struct fifo_cfg __initdata mode_5_cfg[] = {
{ .hw_ep_num =  1, .style = FIFO_TX,   .maxpacket = 512, },
{ .hw_ep_num =  1, .style = FIFO_RX,   .maxpacket = 512, },
{ .hw_ep_num =  2, .style = FIFO_TX,   .maxpacket = 512, },
{ .hw_ep_num =  2, .style = FIFO_RX,   .maxpacket = 512, },
{ .hw_ep_num =  3, .style = FIFO_TX,   .maxpacket = 512, },
{ .hw_ep_num =  3, .style = FIFO_RX,   .maxpacket = 512, },
{ .hw_ep_num =  4, .style = FIFO_TX,   .maxpacket = 512, },
{ .hw_ep_num =  4, .style = FIFO_RX,   .maxpacket = 512, },
{ .hw_ep_num =  5, .style = FIFO_TX,   .maxpacket = 512, },
{ .hw_ep_num =  5, .style = FIFO_RX,   .maxpacket = 512, },
{ .hw_ep_num =  6, .style = FIFO_TX,   .maxpacket = 32, },
{ .hw_ep_num =  6, .style = FIFO_RX,   .maxpacket = 32, },
{ .hw_ep_num =  7, .style = FIFO_TX,   .maxpacket = 32, },
{ .hw_ep_num =  7, .style = FIFO_RX,   .maxpacket = 32, },
{ .hw_ep_num =  8, .style = FIFO_TX,   .maxpacket = 32, },
{ .hw_ep_num =  8, .style = FIFO_RX,   .maxpacket = 32, },
{ .hw_ep_num =  9, .style = FIFO_TX,   .maxpacket = 32, },
{ .hw_ep_num =  9, .style = FIFO_RX,   .maxpacket = 32, },
{ .hw_ep_num = 10, .style = FIFO_TX,   .maxpacket = 32, },
{ .hw_ep_num = 10, .style = FIFO_RX,   .maxpacket = 32, },
{ .hw_ep_num = 11, .style = FIFO_TX,   .maxpacket = 32, },
{ .hw_ep_num = 11, .style = FIFO_RX,   .maxpacket = 32, },
{ .hw_ep_num = 12, .style = FIFO_TX,   .maxpacket = 32, },
{ .hw_ep_num = 12, .style = FIFO_RX,   .maxpacket = 32, },
{ .hw_ep_num = 13, .style = FIFO_RXTX, .maxpacket = 512, },
{ .hw_ep_num = 14, .style = FIFO_RXTX, .maxpacket = 1024, },
{ .hw_ep_num = 15, .style = FIFO_RXTX, .maxpacket = 1024, },
};
F
Felipe Balbi 已提交
1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133

/*
 * configure a fifo; for non-shared endpoints, this may be called
 * once for a tx fifo and once for an rx fifo.
 *
 * returns negative errno or offset for next fifo.
 */
static int __init
fifo_setup(struct musb *musb, struct musb_hw_ep  *hw_ep,
		const struct fifo_cfg *cfg, u16 offset)
{
	void __iomem	*mbase = musb->mregs;
	int	size = 0;
	u16	maxpacket = cfg->maxpacket;
	u16	c_off = offset >> 3;
	u8	c_size;

	/* expect hw_ep has already been zero-initialized */

	size = ffs(max(maxpacket, (u16) 8)) - 1;
	maxpacket = 1 << size;

	c_size = size - 3;
	if (cfg->mode == BUF_DOUBLE) {
1134 1135
		if ((offset + (maxpacket << 1)) >
				(1 << (musb->config->ram_bits + 2)))
F
Felipe Balbi 已提交
1136 1137 1138
			return -EMSGSIZE;
		c_size |= MUSB_FIFOSZ_DPB;
	} else {
1139
		if ((offset + maxpacket) > (1 << (musb->config->ram_bits + 2)))
F
Felipe Balbi 已提交
1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155
			return -EMSGSIZE;
	}

	/* configure the FIFO */
	musb_writeb(mbase, MUSB_INDEX, hw_ep->epnum);

#ifdef CONFIG_USB_MUSB_HDRC_HCD
	/* EP0 reserved endpoint for control, bidirectional;
	 * EP1 reserved for bulk, two unidirection halves.
	 */
	if (hw_ep->epnum == 1)
		musb->bulk_ep = hw_ep;
	/* REVISIT error check:  be sure ep0 can both rx and tx ... */
#endif
	switch (cfg->style) {
	case FIFO_TX:
1156 1157
		musb_write_txfifosz(mbase, c_size);
		musb_write_txfifoadd(mbase, c_off);
F
Felipe Balbi 已提交
1158 1159 1160 1161
		hw_ep->tx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB);
		hw_ep->max_packet_sz_tx = maxpacket;
		break;
	case FIFO_RX:
1162 1163
		musb_write_rxfifosz(mbase, c_size);
		musb_write_rxfifoadd(mbase, c_off);
F
Felipe Balbi 已提交
1164 1165 1166 1167
		hw_ep->rx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB);
		hw_ep->max_packet_sz_rx = maxpacket;
		break;
	case FIFO_RXTX:
1168 1169
		musb_write_txfifosz(mbase, c_size);
		musb_write_txfifoadd(mbase, c_off);
F
Felipe Balbi 已提交
1170 1171 1172
		hw_ep->rx_double_buffered = !!(c_size & MUSB_FIFOSZ_DPB);
		hw_ep->max_packet_sz_rx = maxpacket;

1173 1174
		musb_write_rxfifosz(mbase, c_size);
		musb_write_rxfifoadd(mbase, c_off);
F
Felipe Balbi 已提交
1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224
		hw_ep->tx_double_buffered = hw_ep->rx_double_buffered;
		hw_ep->max_packet_sz_tx = maxpacket;

		hw_ep->is_shared_fifo = true;
		break;
	}

	/* NOTE rx and tx endpoint irqs aren't managed separately,
	 * which happens to be ok
	 */
	musb->epmask |= (1 << hw_ep->epnum);

	return offset + (maxpacket << ((c_size & MUSB_FIFOSZ_DPB) ? 1 : 0));
}

static struct fifo_cfg __initdata ep0_cfg = {
	.style = FIFO_RXTX, .maxpacket = 64,
};

static int __init ep_config_from_table(struct musb *musb)
{
	const struct fifo_cfg	*cfg;
	unsigned		i, n;
	int			offset;
	struct musb_hw_ep	*hw_ep = musb->endpoints;

	switch (fifo_mode) {
	default:
		fifo_mode = 0;
		/* FALLTHROUGH */
	case 0:
		cfg = mode_0_cfg;
		n = ARRAY_SIZE(mode_0_cfg);
		break;
	case 1:
		cfg = mode_1_cfg;
		n = ARRAY_SIZE(mode_1_cfg);
		break;
	case 2:
		cfg = mode_2_cfg;
		n = ARRAY_SIZE(mode_2_cfg);
		break;
	case 3:
		cfg = mode_3_cfg;
		n = ARRAY_SIZE(mode_3_cfg);
		break;
	case 4:
		cfg = mode_4_cfg;
		n = ARRAY_SIZE(mode_4_cfg);
		break;
1225 1226 1227 1228
	case 5:
		cfg = mode_5_cfg;
		n = ARRAY_SIZE(mode_5_cfg);
		break;
F
Felipe Balbi 已提交
1229 1230 1231 1232 1233 1234 1235 1236 1237 1238
	}

	printk(KERN_DEBUG "%s: setup fifo_mode %d\n",
			musb_driver_name, fifo_mode);


	offset = fifo_setup(musb, hw_ep, &ep0_cfg, 0);
	/* assert(offset > 0) */

	/* NOTE:  for RTL versions >= 1.400 EPINFO and RAMINFO would
1239
	 * be better than static musb->config->num_eps and DYN_FIFO_SIZE...
F
Felipe Balbi 已提交
1240 1241 1242 1243 1244
	 */

	for (i = 0; i < n; i++) {
		u8	epn = cfg->hw_ep_num;

1245
		if (epn >= musb->config->num_eps) {
F
Felipe Balbi 已提交
1246 1247
			pr_debug("%s: invalid ep %d\n",
					musb_driver_name, epn);
1248
			return -EINVAL;
F
Felipe Balbi 已提交
1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261
		}
		offset = fifo_setup(musb, hw_ep + epn, cfg++, offset);
		if (offset < 0) {
			pr_debug("%s: mem overrun, ep %d\n",
					musb_driver_name, epn);
			return -EINVAL;
		}
		epn++;
		musb->nr_endpoints = max(epn, musb->nr_endpoints);
	}

	printk(KERN_DEBUG "%s: %d/%d max ep, %d/%d memory\n",
			musb_driver_name,
1262 1263
			n + 1, musb->config->num_eps * 2 - 1,
			offset, (1 << (musb->config->ram_bits + 2)));
F
Felipe Balbi 已提交
1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281

#ifdef CONFIG_USB_MUSB_HDRC_HCD
	if (!musb->bulk_ep) {
		pr_debug("%s: missing bulk\n", musb_driver_name);
		return -EINVAL;
	}
#endif

	return 0;
}


/*
 * ep_config_from_hw - when MUSB_C_DYNFIFO_DEF is false
 * @param musb the controller
 */
static int __init ep_config_from_hw(struct musb *musb)
{
1282
	u8 epnum = 0;
F
Felipe Balbi 已提交
1283 1284
	struct musb_hw_ep *hw_ep;
	void *mbase = musb->mregs;
1285
	int ret = 0;
F
Felipe Balbi 已提交
1286 1287 1288 1289 1290

	DBG(2, "<== static silicon ep config\n");

	/* FIXME pick up ep0 maxpacket size */

1291
	for (epnum = 1; epnum < musb->config->num_eps; epnum++) {
F
Felipe Balbi 已提交
1292 1293 1294
		musb_ep_select(mbase, epnum);
		hw_ep = musb->endpoints + epnum;

1295 1296
		ret = musb_read_fifosize(musb, hw_ep, epnum);
		if (ret < 0)
F
Felipe Balbi 已提交
1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334
			break;

		/* FIXME set up hw_ep->{rx,tx}_double_buffered */

#ifdef CONFIG_USB_MUSB_HDRC_HCD
		/* pick an RX/TX endpoint for bulk */
		if (hw_ep->max_packet_sz_tx < 512
				|| hw_ep->max_packet_sz_rx < 512)
			continue;

		/* REVISIT:  this algorithm is lazy, we should at least
		 * try to pick a double buffered endpoint.
		 */
		if (musb->bulk_ep)
			continue;
		musb->bulk_ep = hw_ep;
#endif
	}

#ifdef CONFIG_USB_MUSB_HDRC_HCD
	if (!musb->bulk_ep) {
		pr_debug("%s: missing bulk\n", musb_driver_name);
		return -EINVAL;
	}
#endif

	return 0;
}

enum { MUSB_CONTROLLER_MHDRC, MUSB_CONTROLLER_HDRC, };

/* Initialize MUSB (M)HDRC part of the USB hardware subsystem;
 * configure endpoints, or take their config from silicon
 */
static int __init musb_core_init(u16 musb_type, struct musb *musb)
{
	u8 reg;
	char *type;
1335
	char aInfo[90], aRevision[32], aDate[12];
F
Felipe Balbi 已提交
1336 1337 1338 1339 1340
	void __iomem	*mbase = musb->mregs;
	int		status = 0;
	int		i;

	/* log core options (read using indexed model) */
1341
	reg = musb_read_configdata(mbase);
F
Felipe Balbi 已提交
1342 1343

	strcpy(aInfo, (reg & MUSB_CONFIGDATA_UTMIDW) ? "UTMI-16" : "UTMI-8");
1344
	if (reg & MUSB_CONFIGDATA_DYNFIFO) {
F
Felipe Balbi 已提交
1345
		strcat(aInfo, ", dyn FIFOs");
1346 1347
		musb->dyn_fifo = true;
	}
F
Felipe Balbi 已提交
1348 1349 1350 1351 1352 1353 1354 1355 1356 1357
	if (reg & MUSB_CONFIGDATA_MPRXE) {
		strcat(aInfo, ", bulk combine");
		musb->bulk_combine = true;
	}
	if (reg & MUSB_CONFIGDATA_MPTXE) {
		strcat(aInfo, ", bulk split");
		musb->bulk_split = true;
	}
	if (reg & MUSB_CONFIGDATA_HBRXE) {
		strcat(aInfo, ", HB-ISO Rx");
1358
		musb->hb_iso_rx = true;
F
Felipe Balbi 已提交
1359 1360 1361
	}
	if (reg & MUSB_CONFIGDATA_HBTXE) {
		strcat(aInfo, ", HB-ISO Tx");
1362
		musb->hb_iso_tx = true;
F
Felipe Balbi 已提交
1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386
	}
	if (reg & MUSB_CONFIGDATA_SOFTCONE)
		strcat(aInfo, ", SoftConn");

	printk(KERN_DEBUG "%s: ConfigData=0x%02x (%s)\n",
			musb_driver_name, reg, aInfo);

	aDate[0] = 0;
	if (MUSB_CONTROLLER_MHDRC == musb_type) {
		musb->is_multipoint = 1;
		type = "M";
	} else {
		musb->is_multipoint = 0;
		type = "";
#ifdef CONFIG_USB_MUSB_HDRC_HCD
#ifndef	CONFIG_USB_OTG_BLACKLIST_HUB
		printk(KERN_ERR
			"%s: kernel must blacklist external hubs\n",
			musb_driver_name);
#endif
#endif
	}

	/* log release info */
1387 1388 1389 1390
	musb->hwvers = musb_read_hwvers(mbase);
	snprintf(aRevision, 32, "%d.%d%s", MUSB_HWVERS_MAJOR(musb->hwvers),
		MUSB_HWVERS_MINOR(musb->hwvers),
		(musb->hwvers & MUSB_HWVERS_RC) ? "RC" : "");
F
Felipe Balbi 已提交
1391 1392 1393 1394
	printk(KERN_DEBUG "%s: %sHDRC RTL version %s %s\n",
			musb_driver_name, type, aRevision, aDate);

	/* configure ep0 */
1395
	musb_configure_ep0(musb);
F
Felipe Balbi 已提交
1396 1397 1398 1399 1400

	/* discover endpoint configuration */
	musb->nr_endpoints = 1;
	musb->epmask = 1;

1401 1402 1403 1404
	if (musb->dyn_fifo)
		status = ep_config_from_table(musb);
	else
		status = ep_config_from_hw(musb);
F
Felipe Balbi 已提交
1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427

	if (status < 0)
		return status;

	/* finish init, and print endpoint config */
	for (i = 0; i < musb->nr_endpoints; i++) {
		struct musb_hw_ep	*hw_ep = musb->endpoints + i;

		hw_ep->fifo = MUSB_FIFO_OFFSET(i) + mbase;
#ifdef CONFIG_USB_TUSB6010
		hw_ep->fifo_async = musb->async + 0x400 + MUSB_FIFO_OFFSET(i);
		hw_ep->fifo_sync = musb->sync + 0x400 + MUSB_FIFO_OFFSET(i);
		hw_ep->fifo_sync_va =
			musb->sync_va + 0x400 + MUSB_FIFO_OFFSET(i);

		if (i == 0)
			hw_ep->conf = mbase - 0x400 + TUSB_EP0_CONF;
		else
			hw_ep->conf = mbase + 0x400 + (((i - 1) & 0xf) << 2);
#endif

		hw_ep->regs = MUSB_EP_OFFSET(i, 0) + mbase;
#ifdef CONFIG_USB_MUSB_HDRC_HCD
1428
		hw_ep->target_regs = musb_read_target_reg_base(i, mbase);
F
Felipe Balbi 已提交
1429 1430 1431 1432 1433
		hw_ep->rx_reinit = 1;
		hw_ep->tx_reinit = 1;
#endif

		if (hw_ep->max_packet_sz_tx) {
1434
			DBG(1,
F
Felipe Balbi 已提交
1435 1436 1437 1438 1439 1440 1441 1442
				"%s: hw_ep %d%s, %smax %d\n",
				musb_driver_name, i,
				hw_ep->is_shared_fifo ? "shared" : "tx",
				hw_ep->tx_double_buffered
					? "doublebuffer, " : "",
				hw_ep->max_packet_sz_tx);
		}
		if (hw_ep->max_packet_sz_rx && !hw_ep->is_shared_fifo) {
1443
			DBG(1,
F
Felipe Balbi 已提交
1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478
				"%s: hw_ep %d%s, %smax %d\n",
				musb_driver_name, i,
				"rx",
				hw_ep->rx_double_buffered
					? "doublebuffer, " : "",
				hw_ep->max_packet_sz_rx);
		}
		if (!(hw_ep->max_packet_sz_tx || hw_ep->max_packet_sz_rx))
			DBG(1, "hw_ep %d not configured\n", i);
	}

	return 0;
}

/*-------------------------------------------------------------------------*/

#if defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP3430)

static irqreturn_t generic_interrupt(int irq, void *__hci)
{
	unsigned long	flags;
	irqreturn_t	retval = IRQ_NONE;
	struct musb	*musb = __hci;

	spin_lock_irqsave(&musb->lock, flags);

	musb->int_usb = musb_readb(musb->mregs, MUSB_INTRUSB);
	musb->int_tx = musb_readw(musb->mregs, MUSB_INTRTX);
	musb->int_rx = musb_readw(musb->mregs, MUSB_INTRRX);

	if (musb->int_usb || musb->int_tx || musb->int_rx)
		retval = musb_interrupt(musb);

	spin_unlock_irqrestore(&musb->lock, flags);

1479
	return retval;
F
Felipe Balbi 已提交
1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506
}

#else
#define generic_interrupt	NULL
#endif

/*
 * handle all the irqs defined by the HDRC core. for now we expect:  other
 * irq sources (phy, dma, etc) will be handled first, musb->int_* values
 * will be assigned, and the irq will already have been acked.
 *
 * called in irq context with spinlock held, irqs blocked
 */
irqreturn_t musb_interrupt(struct musb *musb)
{
	irqreturn_t	retval = IRQ_NONE;
	u8		devctl, power;
	int		ep_num;
	u32		reg;

	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
	power = musb_readb(musb->mregs, MUSB_POWER);

	DBG(4, "** IRQ %s usb%04x tx%04x rx%04x\n",
		(devctl & MUSB_DEVCTL_HM) ? "host" : "peripheral",
		musb->int_usb, musb->int_tx, musb->int_rx);

1507 1508 1509 1510 1511 1512 1513 1514
#ifdef CONFIG_USB_GADGET_MUSB_HDRC
	if (is_otg_enabled(musb) || is_peripheral_enabled(musb))
		if (!musb->gadget_driver) {
			DBG(5, "No gadget driver loaded\n");
			return IRQ_HANDLED;
		}
#endif

F
Felipe Balbi 已提交
1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650
	/* the core can interrupt us for multiple reasons; docs have
	 * a generic interrupt flowchart to follow
	 */
	if (musb->int_usb & STAGE0_MASK)
		retval |= musb_stage0_irq(musb, musb->int_usb,
				devctl, power);

	/* "stage 1" is handling endpoint irqs */

	/* handle endpoint 0 first */
	if (musb->int_tx & 1) {
		if (devctl & MUSB_DEVCTL_HM)
			retval |= musb_h_ep0_irq(musb);
		else
			retval |= musb_g_ep0_irq(musb);
	}

	/* RX on endpoints 1-15 */
	reg = musb->int_rx >> 1;
	ep_num = 1;
	while (reg) {
		if (reg & 1) {
			/* musb_ep_select(musb->mregs, ep_num); */
			/* REVISIT just retval = ep->rx_irq(...) */
			retval = IRQ_HANDLED;
			if (devctl & MUSB_DEVCTL_HM) {
				if (is_host_capable())
					musb_host_rx(musb, ep_num);
			} else {
				if (is_peripheral_capable())
					musb_g_rx(musb, ep_num);
			}
		}

		reg >>= 1;
		ep_num++;
	}

	/* TX on endpoints 1-15 */
	reg = musb->int_tx >> 1;
	ep_num = 1;
	while (reg) {
		if (reg & 1) {
			/* musb_ep_select(musb->mregs, ep_num); */
			/* REVISIT just retval |= ep->tx_irq(...) */
			retval = IRQ_HANDLED;
			if (devctl & MUSB_DEVCTL_HM) {
				if (is_host_capable())
					musb_host_tx(musb, ep_num);
			} else {
				if (is_peripheral_capable())
					musb_g_tx(musb, ep_num);
			}
		}
		reg >>= 1;
		ep_num++;
	}

	return retval;
}


#ifndef CONFIG_MUSB_PIO_ONLY
static int __initdata use_dma = 1;

/* "modprobe ... use_dma=0" etc */
module_param(use_dma, bool, 0);
MODULE_PARM_DESC(use_dma, "enable/disable use of DMA");

void musb_dma_completion(struct musb *musb, u8 epnum, u8 transmit)
{
	u8	devctl = musb_readb(musb->mregs, MUSB_DEVCTL);

	/* called with controller lock already held */

	if (!epnum) {
#ifndef CONFIG_USB_TUSB_OMAP_DMA
		if (!is_cppi_enabled()) {
			/* endpoint 0 */
			if (devctl & MUSB_DEVCTL_HM)
				musb_h_ep0_irq(musb);
			else
				musb_g_ep0_irq(musb);
		}
#endif
	} else {
		/* endpoints 1..15 */
		if (transmit) {
			if (devctl & MUSB_DEVCTL_HM) {
				if (is_host_capable())
					musb_host_tx(musb, epnum);
			} else {
				if (is_peripheral_capable())
					musb_g_tx(musb, epnum);
			}
		} else {
			/* receive */
			if (devctl & MUSB_DEVCTL_HM) {
				if (is_host_capable())
					musb_host_rx(musb, epnum);
			} else {
				if (is_peripheral_capable())
					musb_g_rx(musb, epnum);
			}
		}
	}
}

#else
#define use_dma			0
#endif

/*-------------------------------------------------------------------------*/

#ifdef CONFIG_SYSFS

static ssize_t
musb_mode_show(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct musb *musb = dev_to_musb(dev);
	unsigned long flags;
	int ret = -EINVAL;

	spin_lock_irqsave(&musb->lock, flags);
	ret = sprintf(buf, "%s\n", otg_state_string(musb));
	spin_unlock_irqrestore(&musb->lock, flags);

	return ret;
}

static ssize_t
musb_mode_store(struct device *dev, struct device_attribute *attr,
		const char *buf, size_t n)
{
	struct musb	*musb = dev_to_musb(dev);
	unsigned long	flags;
D
David Brownell 已提交
1651
	int		status;
F
Felipe Balbi 已提交
1652 1653

	spin_lock_irqsave(&musb->lock, flags);
D
David Brownell 已提交
1654 1655 1656 1657 1658 1659 1660 1661
	if (sysfs_streq(buf, "host"))
		status = musb_platform_set_mode(musb, MUSB_HOST);
	else if (sysfs_streq(buf, "peripheral"))
		status = musb_platform_set_mode(musb, MUSB_PERIPHERAL);
	else if (sysfs_streq(buf, "otg"))
		status = musb_platform_set_mode(musb, MUSB_OTG);
	else
		status = -EINVAL;
F
Felipe Balbi 已提交
1662 1663
	spin_unlock_irqrestore(&musb->lock, flags);

D
David Brownell 已提交
1664
	return (status == 0) ? n : status;
F
Felipe Balbi 已提交
1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676
}
static DEVICE_ATTR(mode, 0644, musb_mode_show, musb_mode_store);

static ssize_t
musb_vbus_store(struct device *dev, struct device_attribute *attr,
		const char *buf, size_t n)
{
	struct musb	*musb = dev_to_musb(dev);
	unsigned long	flags;
	unsigned long	val;

	if (sscanf(buf, "%lu", &val) < 1) {
1677
		dev_err(dev, "Invalid VBUS timeout ms value\n");
F
Felipe Balbi 已提交
1678 1679 1680 1681
		return -EINVAL;
	}

	spin_lock_irqsave(&musb->lock, flags);
D
David Brownell 已提交
1682 1683
	/* force T(a_wait_bcon) to be zero/unlimited *OR* valid */
	musb->a_wait_bcon = val ? max_t(int, val, OTG_TIME_A_WAIT_BCON) : 0 ;
1684
	if (musb->xceiv->state == OTG_STATE_A_WAIT_BCON)
F
Felipe Balbi 已提交
1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701
		musb->is_active = 0;
	musb_platform_try_idle(musb, jiffies + msecs_to_jiffies(val));
	spin_unlock_irqrestore(&musb->lock, flags);

	return n;
}

static ssize_t
musb_vbus_show(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct musb	*musb = dev_to_musb(dev);
	unsigned long	flags;
	unsigned long	val;
	int		vbus;

	spin_lock_irqsave(&musb->lock, flags);
	val = musb->a_wait_bcon;
D
David Brownell 已提交
1702 1703 1704
	/* FIXME get_vbus_status() is normally #defined as false...
	 * and is effectively TUSB-specific.
	 */
F
Felipe Balbi 已提交
1705 1706 1707
	vbus = musb_platform_get_vbus_status(musb);
	spin_unlock_irqrestore(&musb->lock, flags);

D
David Brownell 已提交
1708
	return sprintf(buf, "Vbus %s, timeout %lu msec\n",
F
Felipe Balbi 已提交
1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726
			vbus ? "on" : "off", val);
}
static DEVICE_ATTR(vbus, 0644, musb_vbus_show, musb_vbus_store);

#ifdef CONFIG_USB_GADGET_MUSB_HDRC

/* Gadget drivers can't know that a host is connected so they might want
 * to start SRP, but users can.  This allows userspace to trigger SRP.
 */
static ssize_t
musb_srp_store(struct device *dev, struct device_attribute *attr,
		const char *buf, size_t n)
{
	struct musb	*musb = dev_to_musb(dev);
	unsigned short	srp;

	if (sscanf(buf, "%hu", &srp) != 1
			|| (srp != 1)) {
1727
		dev_err(dev, "SRP: Value must be 1\n");
F
Felipe Balbi 已提交
1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739
		return -EINVAL;
	}

	if (srp == 1)
		musb_g_wakeup(musb);

	return n;
}
static DEVICE_ATTR(srp, 0644, NULL, musb_srp_store);

#endif /* CONFIG_USB_GADGET_MUSB_HDRC */

F
Felipe Balbi 已提交
1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752
static struct attribute *musb_attributes[] = {
	&dev_attr_mode.attr,
	&dev_attr_vbus.attr,
#ifdef CONFIG_USB_GADGET_MUSB_HDRC
	&dev_attr_srp.attr,
#endif
	NULL
};

static const struct attribute_group musb_attr_group = {
	.attrs = musb_attributes,
};

F
Felipe Balbi 已提交
1753 1754 1755 1756 1757 1758 1759 1760
#endif	/* sysfs */

/* Only used to provide driver mode change events */
static void musb_irq_work(struct work_struct *data)
{
	struct musb *musb = container_of(data, struct musb, irq_work);
	static int old_state;

1761 1762
	if (musb->xceiv->state != old_state) {
		old_state = musb->xceiv->state;
F
Felipe Balbi 已提交
1763 1764 1765 1766 1767 1768 1769 1770 1771
		sysfs_notify(&musb->controller->kobj, NULL, "mode");
	}
}

/* --------------------------------------------------------------------------
 * Init support
 */

static struct musb *__init
1772 1773
allocate_instance(struct device *dev,
		struct musb_hdrc_config *config, void __iomem *mbase)
F
Felipe Balbi 已提交
1774 1775 1776 1777 1778 1779 1780
{
	struct musb		*musb;
	struct musb_hw_ep	*ep;
	int			epnum;
#ifdef CONFIG_USB_MUSB_HDRC_HCD
	struct usb_hcd	*hcd;

1781
	hcd = usb_create_hcd(&musb_hc_driver, dev, dev_name(dev));
F
Felipe Balbi 已提交
1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793
	if (!hcd)
		return NULL;
	/* usbcore sets dev->driver_data to hcd, and sometimes uses that... */

	musb = hcd_to_musb(hcd);
	INIT_LIST_HEAD(&musb->control);
	INIT_LIST_HEAD(&musb->in_bulk);
	INIT_LIST_HEAD(&musb->out_bulk);

	hcd->uses_new_polling = 1;

	musb->vbuserr_retry = VBUSERR_RETRY_COUNT;
D
David Brownell 已提交
1794
	musb->a_wait_bcon = OTG_TIME_A_WAIT_BCON;
F
Felipe Balbi 已提交
1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805
#else
	musb = kzalloc(sizeof *musb, GFP_KERNEL);
	if (!musb)
		return NULL;
	dev_set_drvdata(dev, musb);

#endif

	musb->mregs = mbase;
	musb->ctrl_base = mbase;
	musb->nIrq = -ENODEV;
1806
	musb->config = config;
1807
	BUG_ON(musb->config->num_eps > MUSB_C_NUM_EPS);
F
Felipe Balbi 已提交
1808
	for (epnum = 0, ep = musb->endpoints;
1809
			epnum < musb->config->num_eps;
F
Felipe Balbi 已提交
1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826
			epnum++, ep++) {
		ep->musb = musb;
		ep->epnum = epnum;
	}

	musb->controller = dev;
	return musb;
}

static void musb_free(struct musb *musb)
{
	/* this has multiple entry modes. it handles fault cleanup after
	 * probe(), where things may be partially set up, as well as rmmod
	 * cleanup after everything's been de-activated.
	 */

#ifdef CONFIG_SYSFS
F
Felipe Balbi 已提交
1827
	sysfs_remove_group(&musb->controller->kobj, &musb_attr_group);
F
Felipe Balbi 已提交
1828 1829 1830 1831 1832 1833
#endif

#ifdef CONFIG_USB_GADGET_MUSB_HDRC
	musb_gadget_cleanup(musb);
#endif

A
Ajay Kumar Gupta 已提交
1834 1835 1836
	if (musb->nIrq >= 0) {
		if (musb->irq_wake)
			disable_irq_wake(musb->nIrq);
F
Felipe Balbi 已提交
1837 1838 1839 1840 1841 1842 1843 1844 1845
		free_irq(musb->nIrq, musb);
	}
	if (is_dma_capable() && musb->dma_controller) {
		struct dma_controller	*c = musb->dma_controller;

		(void) c->stop(c);
		dma_controller_destroy(c);
	}

1846 1847 1848 1849
#ifdef CONFIG_USB_MUSB_OTG
	put_device(musb->xceiv->dev);
#endif

F
Felipe Balbi 已提交
1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912
	musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
	musb_platform_exit(musb);
	musb_writeb(musb->mregs, MUSB_DEVCTL, 0);

	if (musb->clock) {
		clk_disable(musb->clock);
		clk_put(musb->clock);
	}

#ifdef CONFIG_USB_MUSB_HDRC_HCD
	usb_put_hcd(musb_to_hcd(musb));
#else
	kfree(musb);
#endif
}

/*
 * Perform generic per-controller initialization.
 *
 * @pDevice: the controller (already clocked, etc)
 * @nIrq: irq
 * @mregs: virtual address of controller registers,
 *	not yet corrected for platform-specific offsets
 */
static int __init
musb_init_controller(struct device *dev, int nIrq, void __iomem *ctrl)
{
	int			status;
	struct musb		*musb;
	struct musb_hdrc_platform_data *plat = dev->platform_data;

	/* The driver might handle more features than the board; OK.
	 * Fail when the board needs a feature that's not enabled.
	 */
	if (!plat) {
		dev_dbg(dev, "no platform_data?\n");
		return -ENODEV;
	}
	switch (plat->mode) {
	case MUSB_HOST:
#ifdef CONFIG_USB_MUSB_HDRC_HCD
		break;
#else
		goto bad_config;
#endif
	case MUSB_PERIPHERAL:
#ifdef CONFIG_USB_GADGET_MUSB_HDRC
		break;
#else
		goto bad_config;
#endif
	case MUSB_OTG:
#ifdef CONFIG_USB_MUSB_OTG
		break;
#else
bad_config:
#endif
	default:
		dev_err(dev, "incompatible Kconfig role setting\n");
		return -EINVAL;
	}

	/* allocate */
1913
	musb = allocate_instance(dev, plat->config, ctrl);
F
Felipe Balbi 已提交
1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936
	if (!musb)
		return -ENOMEM;

	spin_lock_init(&musb->lock);
	musb->board_mode = plat->mode;
	musb->board_set_power = plat->set_power;
	musb->set_clock = plat->set_clock;
	musb->min_power = plat->min_power;

	/* Clock usage is chip-specific ... functional clock (DaVinci,
	 * OMAP2430), or PHY ref (some TUSB6010 boards).  All this core
	 * code does is make sure a clock handle is available; platform
	 * code manages it during start/stop and suspend/resume.
	 */
	if (plat->clock) {
		musb->clock = clk_get(dev, plat->clock);
		if (IS_ERR(musb->clock)) {
			status = PTR_ERR(musb->clock);
			musb->clock = NULL;
			goto fail;
		}
	}

1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948
	/* The musb_platform_init() call:
	 *   - adjusts musb->mregs and musb->isr if needed,
	 *   - may initialize an integrated tranceiver
	 *   - initializes musb->xceiv, usually by otg_get_transceiver()
	 *   - activates clocks.
	 *   - stops powering VBUS
	 *   - assigns musb->board_set_vbus if host mode is enabled
	 *
	 * There are various transciever configurations.  Blackfin,
	 * DaVinci, TUSB60x0, and others integrate them.  OMAP3 uses
	 * external/discrete ones in various flavors (twl4030 family,
	 * isp1504, non-OTG, etc) mostly hooking up through ULPI.
F
Felipe Balbi 已提交
1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978
	 */
	musb->isr = generic_interrupt;
	status = musb_platform_init(musb);

	if (status < 0)
		goto fail;
	if (!musb->isr) {
		status = -ENODEV;
		goto fail2;
	}

#ifndef CONFIG_MUSB_PIO_ONLY
	if (use_dma && dev->dma_mask) {
		struct dma_controller	*c;

		c = dma_controller_create(musb, musb->mregs);
		musb->dma_controller = c;
		if (c)
			(void) c->start(c);
	}
#endif
	/* ideally this would be abstracted in platform setup */
	if (!is_dma_capable() || !musb->dma_controller)
		dev->dma_mask = NULL;

	/* be sure interrupts are disabled before connecting ISR */
	musb_platform_disable(musb);
	musb_generic_disable(musb);

	/* setup musb parts of the core (especially endpoints) */
1979
	status = musb_core_init(plat->config->multipoint
F
Felipe Balbi 已提交
1980 1981 1982 1983 1984
			? MUSB_CONTROLLER_MHDRC
			: MUSB_CONTROLLER_HDRC, musb);
	if (status < 0)
		goto fail2;

1985
#ifdef CONFIG_USB_MUSB_OTG
D
David Brownell 已提交
1986 1987 1988
	setup_timer(&musb->otg_timer, musb_otg_timer_func, (unsigned long) musb);
#endif

F
Felipe Balbi 已提交
1989 1990 1991 1992
	/* Init IRQ workqueue before request_irq */
	INIT_WORK(&musb->irq_work, musb_irq_work);

	/* attach to the IRQ */
1993
	if (request_irq(nIrq, musb->isr, 0, dev_name(dev), musb)) {
F
Felipe Balbi 已提交
1994 1995 1996 1997 1998 1999
		dev_err(dev, "request_irq %d failed!\n", nIrq);
		status = -ENODEV;
		goto fail2;
	}
	musb->nIrq = nIrq;
/* FIXME this handles wakeup irqs wrong */
2000 2001
	if (enable_irq_wake(nIrq) == 0) {
		musb->irq_wake = 1;
F
Felipe Balbi 已提交
2002
		device_init_wakeup(dev, 1);
2003 2004 2005
	} else {
		musb->irq_wake = 0;
	}
F
Felipe Balbi 已提交
2006

2007 2008
	/* host side needs more setup */
	if (is_host_enabled(musb)) {
F
Felipe Balbi 已提交
2009
		struct usb_hcd	*hcd = musb_to_hcd(musb);
2010
		u8 busctl;
F
Felipe Balbi 已提交
2011

2012 2013 2014
		otg_set_host(musb->xceiv, &hcd->self);

		if (is_otg_enabled(musb))
F
Felipe Balbi 已提交
2015
			hcd->self.otg_port = 1;
2016
		musb->xceiv->host = &hcd->self;
F
Felipe Balbi 已提交
2017
		hcd->power_budget = 2 * (plat->power ? : 250);
2018 2019 2020 2021 2022 2023 2024

		/* program PHY to use external vBus if required */
		if (plat->extvbus) {
			busctl = musb_readb(musb->mregs, MUSB_ULPI_BUSCONTROL);
			busctl |= MUSB_ULPI_USE_EXTVBUS;
			musb_writeb(musb->mregs, MUSB_ULPI_BUSCONTROL, busctl);
		}
F
Felipe Balbi 已提交
2025 2026 2027 2028 2029 2030 2031 2032
	}

	/* For the host-only role, we can activate right away.
	 * (We expect the ID pin to be forcibly grounded!!)
	 * Otherwise, wait till the gadget driver hooks up.
	 */
	if (!is_otg_enabled(musb) && is_host_enabled(musb)) {
		MUSB_HST_MODE(musb);
2033 2034
		musb->xceiv->default_a = 1;
		musb->xceiv->state = OTG_STATE_A_IDLE;
F
Felipe Balbi 已提交
2035 2036

		status = usb_add_hcd(musb_to_hcd(musb), -1, 0);
2037 2038
		if (status)
			goto fail;
F
Felipe Balbi 已提交
2039 2040 2041 2042 2043 2044 2045 2046 2047 2048

		DBG(1, "%s mode, status %d, devctl %02x %c\n",
			"HOST", status,
			musb_readb(musb->mregs, MUSB_DEVCTL),
			(musb_readb(musb->mregs, MUSB_DEVCTL)
					& MUSB_DEVCTL_BDEVICE
				? 'B' : 'A'));

	} else /* peripheral is enabled */ {
		MUSB_DEV_MODE(musb);
2049 2050
		musb->xceiv->default_a = 0;
		musb->xceiv->state = OTG_STATE_B_IDLE;
F
Felipe Balbi 已提交
2051 2052

		status = musb_gadget_setup(musb);
2053 2054
		if (status)
			goto fail;
F
Felipe Balbi 已提交
2055 2056 2057 2058 2059 2060 2061 2062 2063

		DBG(1, "%s mode, status %d, dev%02x\n",
			is_otg_enabled(musb) ? "OTG" : "PERIPHERAL",
			status,
			musb_readb(musb->mregs, MUSB_DEVCTL));

	}

#ifdef CONFIG_SYSFS
F
Felipe Balbi 已提交
2064
	status = sysfs_create_group(&musb->controller->kobj, &musb_attr_group);
F
Felipe Balbi 已提交
2065
#endif
2066 2067
	if (status)
		goto fail2;
F
Felipe Balbi 已提交
2068

2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080
	dev_info(dev, "USB %s mode controller at %p using %s, IRQ %d\n",
			({char *s;
			 switch (musb->board_mode) {
			 case MUSB_HOST:		s = "Host"; break;
			 case MUSB_PERIPHERAL:	s = "Peripheral"; break;
			 default:		s = "OTG"; break;
			 }; s; }),
			ctrl,
			(is_dma_capable() && musb->dma_controller)
			? "DMA" : "PIO",
			musb->nIrq);

2081
	return 0;
F
Felipe Balbi 已提交
2082 2083 2084

fail2:
	musb_platform_exit(musb);
2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095
fail:
	dev_err(musb->controller,
		"musb_init_controller failed with status %d\n", status);

	if (musb->clock)
		clk_put(musb->clock);
	device_init_wakeup(dev, 0);
	musb_free(musb);

	return status;

F
Felipe Balbi 已提交
2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111
}

/*-------------------------------------------------------------------------*/

/* all implementations (PCI bridge to FPGA, VLYNQ, etc) should just
 * bridge to a platform device; this driver then suffices.
 */

#ifndef CONFIG_MUSB_PIO_ONLY
static u64	*orig_dma_mask;
#endif

static int __init musb_probe(struct platform_device *pdev)
{
	struct device	*dev = &pdev->dev;
	int		irq = platform_get_irq(pdev, 0);
2112
	int		status;
F
Felipe Balbi 已提交
2113 2114 2115 2116 2117 2118 2119
	struct resource	*iomem;
	void __iomem	*base;

	iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	if (!iomem || irq == 0)
		return -ENODEV;

F
Felipe Balbi 已提交
2120
	base = ioremap(iomem->start, resource_size(iomem));
F
Felipe Balbi 已提交
2121 2122 2123 2124 2125 2126 2127 2128 2129
	if (!base) {
		dev_err(dev, "ioremap failed\n");
		return -ENOMEM;
	}

#ifndef CONFIG_MUSB_PIO_ONLY
	/* clobbered by use_dma=n */
	orig_dma_mask = dev->dma_mask;
#endif
2130 2131 2132 2133 2134 2135

	status = musb_init_controller(dev, irq, base);
	if (status < 0)
		iounmap(base);

	return status;
F
Felipe Balbi 已提交
2136 2137
}

2138
static int __exit musb_remove(struct platform_device *pdev)
F
Felipe Balbi 已提交
2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163
{
	struct musb	*musb = dev_to_musb(&pdev->dev);
	void __iomem	*ctrl_base = musb->ctrl_base;

	/* this gets called on rmmod.
	 *  - Host mode: host may still be active
	 *  - Peripheral mode: peripheral is deactivated (or never-activated)
	 *  - OTG mode: both roles are deactivated (or never-activated)
	 */
	musb_shutdown(pdev);
#ifdef CONFIG_USB_MUSB_HDRC_HCD
	if (musb->board_mode == MUSB_HOST)
		usb_remove_hcd(musb_to_hcd(musb));
#endif
	musb_free(musb);
	iounmap(ctrl_base);
	device_init_wakeup(&pdev->dev, 0);
#ifndef CONFIG_MUSB_PIO_ONLY
	pdev->dev.dma_mask = orig_dma_mask;
#endif
	return 0;
}

#ifdef	CONFIG_PM

2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230
static struct musb_context_registers musb_context;

void musb_save_context(struct musb *musb)
{
	int i;
	void __iomem *musb_base = musb->mregs;

	if (is_host_enabled(musb)) {
		musb_context.frame = musb_readw(musb_base, MUSB_FRAME);
		musb_context.testmode = musb_readb(musb_base, MUSB_TESTMODE);
	}
	musb_context.power = musb_readb(musb_base, MUSB_POWER);
	musb_context.intrtxe = musb_readw(musb_base, MUSB_INTRTXE);
	musb_context.intrrxe = musb_readw(musb_base, MUSB_INTRRXE);
	musb_context.intrusbe = musb_readb(musb_base, MUSB_INTRUSBE);
	musb_context.index = musb_readb(musb_base, MUSB_INDEX);
	musb_context.devctl = musb_readb(musb_base, MUSB_DEVCTL);

	for (i = 0; i < MUSB_C_NUM_EPS; ++i) {
		musb_writeb(musb_base, MUSB_INDEX, i);
		musb_context.index_regs[i].txmaxp =
			musb_readw(musb_base, 0x10 + MUSB_TXMAXP);
		musb_context.index_regs[i].txcsr =
			musb_readw(musb_base, 0x10 + MUSB_TXCSR);
		musb_context.index_regs[i].rxmaxp =
			musb_readw(musb_base, 0x10 + MUSB_RXMAXP);
		musb_context.index_regs[i].rxcsr =
			musb_readw(musb_base, 0x10 + MUSB_RXCSR);

		if (musb->dyn_fifo) {
			musb_context.index_regs[i].txfifoadd =
					musb_read_txfifoadd(musb_base);
			musb_context.index_regs[i].rxfifoadd =
					musb_read_rxfifoadd(musb_base);
			musb_context.index_regs[i].txfifosz =
					musb_read_txfifosz(musb_base);
			musb_context.index_regs[i].rxfifosz =
					musb_read_rxfifosz(musb_base);
		}
		if (is_host_enabled(musb)) {
			musb_context.index_regs[i].txtype =
				musb_readb(musb_base, 0x10 + MUSB_TXTYPE);
			musb_context.index_regs[i].txinterval =
				musb_readb(musb_base, 0x10 + MUSB_TXINTERVAL);
			musb_context.index_regs[i].rxtype =
				musb_readb(musb_base, 0x10 + MUSB_RXTYPE);
			musb_context.index_regs[i].rxinterval =
				musb_readb(musb_base, 0x10 + MUSB_RXINTERVAL);

			musb_context.index_regs[i].txfunaddr =
				musb_read_txfunaddr(musb_base, i);
			musb_context.index_regs[i].txhubaddr =
				musb_read_txhubaddr(musb_base, i);
			musb_context.index_regs[i].txhubport =
				musb_read_txhubport(musb_base, i);

			musb_context.index_regs[i].rxfunaddr =
				musb_read_rxfunaddr(musb_base, i);
			musb_context.index_regs[i].rxhubaddr =
				musb_read_rxhubaddr(musb_base, i);
			musb_context.index_regs[i].rxhubport =
				musb_read_rxhubport(musb_base, i);
		}
	}

	musb_writeb(musb_base, MUSB_INDEX, musb_context.index);

2231
	musb_platform_save_context(musb, &musb_context);
2232 2233 2234 2235 2236 2237 2238 2239
}

void musb_restore_context(struct musb *musb)
{
	int i;
	void __iomem *musb_base = musb->mregs;
	void __iomem *ep_target_regs;

2240
	musb_platform_restore_context(musb, &musb_context);
2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305

	if (is_host_enabled(musb)) {
		musb_writew(musb_base, MUSB_FRAME, musb_context.frame);
		musb_writeb(musb_base, MUSB_TESTMODE, musb_context.testmode);
	}
	musb_writeb(musb_base, MUSB_POWER, musb_context.power);
	musb_writew(musb_base, MUSB_INTRTXE, musb_context.intrtxe);
	musb_writew(musb_base, MUSB_INTRRXE, musb_context.intrrxe);
	musb_writeb(musb_base, MUSB_INTRUSBE, musb_context.intrusbe);
	musb_writeb(musb_base, MUSB_DEVCTL, musb_context.devctl);

	for (i = 0; i < MUSB_C_NUM_EPS; ++i) {
		musb_writeb(musb_base, MUSB_INDEX, i);
		musb_writew(musb_base, 0x10 + MUSB_TXMAXP,
			musb_context.index_regs[i].txmaxp);
		musb_writew(musb_base, 0x10 + MUSB_TXCSR,
			musb_context.index_regs[i].txcsr);
		musb_writew(musb_base, 0x10 + MUSB_RXMAXP,
			musb_context.index_regs[i].rxmaxp);
		musb_writew(musb_base, 0x10 + MUSB_RXCSR,
			musb_context.index_regs[i].rxcsr);

		if (musb->dyn_fifo) {
			musb_write_txfifosz(musb_base,
				musb_context.index_regs[i].txfifosz);
			musb_write_rxfifosz(musb_base,
				musb_context.index_regs[i].rxfifosz);
			musb_write_txfifoadd(musb_base,
				musb_context.index_regs[i].txfifoadd);
			musb_write_rxfifoadd(musb_base,
				musb_context.index_regs[i].rxfifoadd);
		}

		if (is_host_enabled(musb)) {
			musb_writeb(musb_base, 0x10 + MUSB_TXTYPE,
				musb_context.index_regs[i].txtype);
			musb_writeb(musb_base, 0x10 + MUSB_TXINTERVAL,
				musb_context.index_regs[i].txinterval);
			musb_writeb(musb_base, 0x10 + MUSB_RXTYPE,
				musb_context.index_regs[i].rxtype);
			musb_writeb(musb_base, 0x10 + MUSB_RXINTERVAL,

			musb_context.index_regs[i].rxinterval);
			musb_write_txfunaddr(musb_base, i,
				musb_context.index_regs[i].txfunaddr);
			musb_write_txhubaddr(musb_base, i,
				musb_context.index_regs[i].txhubaddr);
			musb_write_txhubport(musb_base, i,
				musb_context.index_regs[i].txhubport);

			ep_target_regs =
				musb_read_target_reg_base(i, musb_base);

			musb_write_rxfunaddr(ep_target_regs,
				musb_context.index_regs[i].rxfunaddr);
			musb_write_rxhubaddr(ep_target_regs,
				musb_context.index_regs[i].rxhubaddr);
			musb_write_rxhubport(ep_target_regs,
				musb_context.index_regs[i].rxhubport);
		}
	}

	musb_writeb(musb_base, MUSB_INDEX, musb_context.index);
}

2306
static int musb_suspend(struct device *dev)
F
Felipe Balbi 已提交
2307
{
2308
	struct platform_device *pdev = to_platform_device(dev);
F
Felipe Balbi 已提交
2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326
	unsigned long	flags;
	struct musb	*musb = dev_to_musb(&pdev->dev);

	if (!musb->clock)
		return 0;

	spin_lock_irqsave(&musb->lock, flags);

	if (is_peripheral_active(musb)) {
		/* FIXME force disconnect unless we know USB will wake
		 * the system up quickly enough to respond ...
		 */
	} else if (is_host_active(musb)) {
		/* we know all the children are suspended; sometimes
		 * they will even be wakeup-enabled.
		 */
	}

2327 2328
	musb_save_context(musb);

F
Felipe Balbi 已提交
2329 2330 2331 2332 2333 2334 2335 2336
	if (musb->set_clock)
		musb->set_clock(musb->clock, 0);
	else
		clk_disable(musb->clock);
	spin_unlock_irqrestore(&musb->lock, flags);
	return 0;
}

2337
static int musb_resume_noirq(struct device *dev)
F
Felipe Balbi 已提交
2338
{
2339
	struct platform_device *pdev = to_platform_device(dev);
F
Felipe Balbi 已提交
2340 2341 2342 2343 2344 2345 2346 2347 2348 2349
	struct musb	*musb = dev_to_musb(&pdev->dev);

	if (!musb->clock)
		return 0;

	if (musb->set_clock)
		musb->set_clock(musb->clock, 1);
	else
		clk_enable(musb->clock);

2350 2351
	musb_restore_context(musb);

F
Felipe Balbi 已提交
2352
	/* for static cmos like DaVinci, register values were preserved
2353 2354
	 * unless for some reason the whole soc powered down or the USB
	 * module got reset through the PSC (vs just being disabled).
F
Felipe Balbi 已提交
2355 2356 2357 2358
	 */
	return 0;
}

2359
static const struct dev_pm_ops musb_dev_pm_ops = {
2360 2361 2362 2363 2364
	.suspend	= musb_suspend,
	.resume_noirq	= musb_resume_noirq,
};

#define MUSB_DEV_PM_OPS (&musb_dev_pm_ops)
F
Felipe Balbi 已提交
2365
#else
2366
#define	MUSB_DEV_PM_OPS	NULL
F
Felipe Balbi 已提交
2367 2368 2369 2370 2371 2372 2373
#endif

static struct platform_driver musb_driver = {
	.driver = {
		.name		= (char *)musb_driver_name,
		.bus		= &platform_bus_type,
		.owner		= THIS_MODULE,
2374
		.pm		= MUSB_DEV_PM_OPS,
F
Felipe Balbi 已提交
2375
	},
2376
	.remove		= __exit_p(musb_remove),
F
Felipe Balbi 已提交
2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409
	.shutdown	= musb_shutdown,
};

/*-------------------------------------------------------------------------*/

static int __init musb_init(void)
{
#ifdef CONFIG_USB_MUSB_HDRC_HCD
	if (usb_disabled())
		return 0;
#endif

	pr_info("%s: version " MUSB_VERSION ", "
#ifdef CONFIG_MUSB_PIO_ONLY
		"pio"
#elif defined(CONFIG_USB_TI_CPPI_DMA)
		"cppi-dma"
#elif defined(CONFIG_USB_INVENTRA_DMA)
		"musb-dma"
#elif defined(CONFIG_USB_TUSB_OMAP_DMA)
		"tusb-omap-dma"
#else
		"?dma?"
#endif
		", "
#ifdef CONFIG_USB_MUSB_OTG
		"otg (peripheral+host)"
#elif defined(CONFIG_USB_GADGET_MUSB_HDRC)
		"peripheral"
#elif defined(CONFIG_USB_MUSB_HDRC_HCD)
		"host"
#endif
		", debug=%d\n",
2410
		musb_driver_name, musb_debug);
F
Felipe Balbi 已提交
2411 2412 2413
	return platform_driver_probe(&musb_driver, musb_probe);
}

2414 2415
/* make us init after usbcore and i2c (transceivers, regulators, etc)
 * and before usb gadget and host-side drivers start to register
F
Felipe Balbi 已提交
2416
 */
2417
fs_initcall(musb_init);
F
Felipe Balbi 已提交
2418 2419 2420 2421 2422 2423

static void __exit musb_cleanup(void)
{
	platform_driver_unregister(&musb_driver);
}
module_exit(musb_cleanup);